RINGTAILED LEMUR BIOLOGY Lemur Catta in Madagascar

RINGTAILED LEMUR BIOLOGY Lemur Catta in Madagascar DEVELOPMENTS IN PRIMATOLOGY: PROGRESS AND PROSPECTS Series Editor: Russell H. Tuttle University of Chicago, Chicago, Illinois This peer-reviewed book series melds the facts of organic diversity with the continuity of the evolutionary process. The volumes in this series exemplify the diversity of theoretical perspectives and methodological approaches currently employed by primatologists and physical anthropologists. Specific coverage includes: primate behavior in natural habitats and captive settings primate ecology and conservation; functional morphology and developmental biology of primates primate systematics genetic and phenotypic differences among living primates and paleoprimatology. COMPARATIVE VERTEBRATE COGNITION Edited by Lesley J. Rogers and Gisela Kaplan ANTHROPOID ORIGINS: NEW VISIONS Edited by Callum F. Ross and Richard F. Kay MODERN MORPHOMETRICS IN PHYSICAL ANTHROPOLOGY Edited by Dennis E. Slice BEHAVIORAL FLEXIBILITY IN PRIMATES: CAUSES AND CONSEQUENCES By Clara B. Jones NURSERY REARING OF NONHUMAN PRIMATES IN THE 21ST CENTURY Edited by Gene P. Sackett, Gerald C. Ruppenthal and Kate Elias NEW PERSPECTIVES IN THE STUDY OF MESOAMERICAN PRIMATES: DISTRIBUTION, ECOLOGY, BEHAVIOR, AND CONSERVATION Edited by Paul Garber, Alejandro Estrada, Mary Pavelka and LeAndra Luecke HUMAN ORIGINS AND ENVIRONMENTAL BACKGROUNDS Edited by Hidemi Ishida, Martin Pickford, Naomichi Ogihara and Masato Nakatsukasa PRIMATE BIOGEOGRAPHY Edited by Shawn M. Lehman and John Fleagle REPRODUCTION AND FITNESS IN BABOONS: BEHAVIORAL, ECOLOGICAL, AND LIFE HISTORY PERSPECTIVES Edited by Larissa Swedell and Steven R. Leigh PRIMATE ORIGINS: ADAPTATIONS AND EVOLUTION Edited by Matthew J. Ravosa and Marian Dagosto RINGTAILED LEMUR BIOLOGY: LEMUR CATTA IN MADAGASCAR Edited by Alison Jolly, Robert W. Sussman, Naoki Koyama and Hantanirina Rasamimanana RINGTAILED LEMUR BIOLOGY Lemur Catta in Madagascar Edited by Alison Jolly University of Sussex Brighton, United Kingdom Robert W. Sussman Washington University St. Louis, Missouri, USA Naoki Koyama Kyoto University Kyoto, Japan Hantanirina Rasamimanana University of Antananarivo Antananarivo, Madagascar Alison Jolly Robert W. Sussman Department of Biology and Department of Anthropology Environmental Sciences Washington University University of Sussex St. Louis, Missouri 63130-4899 Lewes BN7 1HX, Brighton USA UK [email protected] [email protected] Naoki Koyama Hantanirina Rasamimanana Center for African Area Studies École Normale Supérieure Kyoto University University of Antananarivo Kyoto 606-8501 BP 881 JAPAN Antananarivo 101 [email protected] MADAGASCAR [email protected] Library of Congress Control Number: 2006921354 ISBN 10: 0-387-32669-3 ISBN 13: 978-0387-32669-6 Printed on acid-free paper. © 2006 Springer Science+Business Media, LLC All rights reserved. This work may not be translated or copied in whole or in part without the written permission of the publisher (Springer Science+Business Media, LLC, 233 Spring Street, New York, NY 10013, USA), except for brief excerpts in connection with reviews or scholarly analysis. 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(SPi/IBT) 987654321 springer.com Preface This book is a truly international collaboration, with editors based on four conti- nents and first authors from Canada, France, Japan, Madagascar, the United Kingdom, and the United States. Clearly, there is something attractive about studying Lemur catta, the ringtailed lemur. Perhaps it is the lemurs themselves! Why study ringtailed lemurs? Because lemurs are a separate radiation of primates from the monkeys, apes, and humans. Because ringtails live in the largest social groups of any known lemur and therefore offer the closest comparison with other social primates, including ourselves. And also because ringtails have become the flagship species of Madagascar. Some 70 species or subspecies of lemurs inhabit Madagascar. Each kind has its own fascinating story, but ringtails are the ones that everyone thinks they know. That black-and-white tail adorns tourist brochures and school notebooks and banknotes. All the same, after 40 years of field study, we don’t know nearly enough. In this book, we make a first estimate on how many might be alive today, but we do not know how many ringtailed lemurs and how many southern forests will survive. This book explores part of what we do know. Its four sections are (I) Distribution: Ringtailed Lemurs in Madagascar, (II) Ringtails and Their Forests: Feeding and Ranging Behavior, (III) Social Behavior Within and Between Troops, and finally (IV) Health and Disease. Of course, all these issues are inter- related. We would like to point out some cross-cutting themes that emerge from the chapters if read as a whole. The first is that the southern area of Madagascar, where the ringtails live, spans a huge variety of habitats and a huge variation of year-to-year fluctuations in cli- mate. The range of ringtails lies mainly in very dry spiny forests and marginal scrub, but they also flourish in rich, tamarind-dominated gallery forests, in the fortress canyons of the Isalo, and even above the tree-line on the Andringitra Massif (Goodman et al. and Sussman et al. on range). Beza Mahafaly Reserve and Berenty Reserve, the only two long-term study sites, Both lie in gallery forest and thus represent the homes of lemur plutocrats rather than more widespread and more challenging habitats (Sussman et al. on Beza, Jolly et al. on Berenty). Even within such favored areas though, the effect of recurrent drought can be catastrophic. It shapes everything – from population size to life history to v vi Preface microevolution (Jolly et al. on territoriality as bet hedging; Cuozzo and Sauther on tooth microevolution). Furthermore, the small patches of gallery forest have always been discontinuous, and they have shifted in space over a timescale of decades or centuries even before people began to clear them (Blumenfeld-Jones et al. on tamarind recruitment). Thus, any overview of the species needs the widest possible spread in space and time, because no one year, and not even any one forest, can be called “typical.” In fact, ringtailed lemurs as a species are adapted to difference and challenge. This is one reason why they are so well known. Zoos love to exhibit them, not only as striking animals but also because they are semiterrestrial, diurnal, at home in discontinuous habitat, and individually as tough as old boots. The second theme is the importance of tamarind trees, Tamarindus indica. This keystone resource provides food year round, whether green pods in the dry, cold winter season when females are gestating, ripe fruit as the young are born and lac- tation begins, or fruit and leaves when the young are weaned. Years when the fruit fails are disastrous for the lemurs. Long-term patterns of tamarind growth and regeneration determine lemur use of the richest of their forest habitats If the ringtails’ access to the tamarinds is limited by competing brown lemurs, this is also likely to have a major impact on their populations and distribution. (Simmen et al., plant food species; Blumenfeld-Jones, tamarind recruitment; Koyama et al., tamarinds and home range; Mertl-Millhollen et al., tamarind quality; Simmen et al., taste thresholds; Cuozzo and Sauther, tooth microevolution; Pinkus et al., brown lemur competition). The third theme is the extreme role played by females in troop coherence, troop rivalry, and resource defense. Female dominance over males does not reflect dif- ferential energy expenditure (Rasamimanana et al., energetic strategy). However, it is clear that intertroop female resource defense is crucial in gallery forest (Pride et al., group size and defense). Within a troop, females vie directly for status (Pereira, agonistic power). Status in turn is fundamental to continued troop membership. Subordinates exiled by targeted aggression may roam as all-female nomadic groups for many months before they succeed in establising defended ranges (Ichino et al., social changes). Even then the ranges are usually inferior to those held by former dominants: inequality may be perpetuated over generations (Jolly et al., territory as bet hedging). Immigrant males as postulants for troop membership seem secondary to the troop structure, though crucial for the mixing of genes (Gould et al., male migration). But males are still an unsolved riddle: why do such combative, polygamous animals not evolve dominance over females? A fourth theme is the role of health and disease, particularly in human-altered habitats. At Berenty Reserve, the lemurs have adopted introduced species as foods, which have benefited them, allowing massive population growth

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